Meter



May 12, 1931 M. CORNELLv 1 Re. 18,067

METER Original Filed May 14, `1929` ,25cm/9.115011` I Mega Cor/7e ,Attorneys Reissued May 12,` 1931 UNITED STATES PATENT OFFICE MEAD. CORNELL, OF sAN FRANCISCO, CALIFORNIA, AssIGNOR, BY MEsNiI ASSIGNMENTS, To THE MERRILL COMPANY, or s AN FRANCISCO, CALIFORNIA, A coRrORATION F CALIFORNIA METER Original No. 1,753,552, dated April. 8, 1930, Serial No.

' filed June 10, 1930.

various viscosities particularly light to heavy oils while under flow.

The invention has for its principal objects to provide a meter of small size but of relatively large capacity; one which is extremely accurate in the measuring of fluids one so constructed as to enable the measuring action to 'continue even though particles of foreign material may find their way into the measuring chamber and which would ordinarily stop the operation of the piston. A further object is to construct a meter wherein a plurality of, parts are of du licate or substantially duplicate structure, thus reducing the cost of manufacture of the meter. Other and important objects are to provide a meter having a novel form of reset for the indicating means; one having a pivoted bridge associated with the piston and one wherein loss of accuracy by friction is reduced ton minimum.

Vith the above mentioned and other objects in view, the invention consistsin the novel construction and lcombination of parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion,

size and minor details of construction within -the scope of the claims may be resorted to withoutdeparting from the spirit or sacrificing any of the advantagesof the invention. 7

v'lo more clearly comprehend the invention, reference is directed to the accompanying drawing, wherein Figure 1 is a view in planof the embodiment of my invention.

Figure 2 is a view in side elevation.

Figure 3 is-a section on line S-S-Fig. 2.

Figure 4 is a section on line 4 -4--Figi 2.

Figure 5 is a section on line 5-5- -Fig. 2.

Figure Gis a fragmentary sectional view on line G-G-Fig; 1.

In thedrawings, wherein like characters of reference designate corresponding parts,the numeral l indicates the body casting of a double piston meter provided on opposite faces with cored piston receiving chambers 2,

preferred 363,016, 1aed M1131 14, 1929. Application far remue serial No. 460,241.

circular in plan and separated by a wal1`3 formed in its center with a ring bearing orifice 4. The casting 1 is formed at opposite sides with the Huid inlet orifice 5 and the outlet orifice 6. The interior of the casting is provided with a lateral orifice or passageway 7 opening to the top and bottom of the castmg and connecting the fluid inlet therewith, and also with a lateral orifice or passageway 8 opening tothe top and bottom of the casting and connecting the Huid outlet therewith.

Withinthe circular piston receiving chambers 2 aremounted the respective disk shaped pistons 9 of. a diameter considerably less than the interior diameter of their respective chambers and each radially slotted to approximately its center, as at 10. The pistons spective pistons 9 extends a bridge 13 dis-` posed vertically, one within each'chamber 2 and mountedat one end to swing on avertical fulcrum 14. The bridge affords an abutment against which the pressure of the iiuid builds up when admitted into the chamber to act on the piston therein and causeits periphery to wipe about the peripheral edge'of the chain-v ber with the rotation of the split bearing 12 directing the wiping action or gyrating movement` of the piston controlled thereby. During the' wiping or gyrating movement of the piston a slight swinging movement is imparted to the abutment.

On opposite faces of the meter body casting are, removably secured by screws 14', the cored or ch annelled top and bottom plates 15 and 16. Gaskets 17 are positioned between the respective plates andV their associated faces of the body casting. One face of each plate is providedfwith a raised portion 18 circular in plan to fit in its associated chamber 2, Figs. 5 and 6, and center the respective end plates in position.

fluid passage 19 connecting at its inlet en by port 20 with the interior of the upper valve chamber at one side of the bridge 13, and at its discharge end through the orifice or passageway 21 with the passage 8 in the body casting 1. The top plate is also provided with a cored channel or passageway 22 communicating at its inlet end 23 with the passage 7 in the body casting 1, andat its discharge end, by port 24, with the interior of the upper valve chamber at theother side-of bridge 13. The fiuid under pressure entering 24 through 7 and 23 acts on the periphery of the piston in the upper chamber to cause a gyrating thereof in its chamber and as the movement of the piston uncovers 20 the fiuid escapes through 19 to 21 and outwardly through 8. Thus the fluid under pressure operating the piston is a uniform measured quantity at each revolution.

Should any hard substance lodge between the periphery of the piston and the peripheral wall of thechamber, or should a film of material build up between these surfaces the movement of the piston will not be impaired, as the slot in ring 12 will enable the yielding of the ring and permit an off axis movement of the pin 11. Q

The meter bottom plate 16 is provided interiorly with a cored channel or passageway 25 opening at its inlet end into the lower end of 7 through port 26 and at its op osite end opening into the lower valve cham er at one -side of the bridge 13 at a point diametrically opposite port 2O in top coverplate 15.V It is through this channel and p orts that the fluid under pressure enters the lower valve chamber and acts on the lower piston, the fiuid 'travelling in the direction of the solid line arrow, and passing from the chamber through the discharge port 27 which connects through channel 8 with outlet 6.

To render the meter accurate should any error take place in the actual quantity of material passing therethrough as compared with the quantity shown by the register, a by-pass port 28 is provided in the lbridge wall 29 separating the. discharge end of channel 25 from port 27. The flow of material through 'the by-pass port is controlled by` the adjustment of a screw 30 which controls the orifice thereof. This screw falls short of extending through the outer wall of plate 16 and its end is sealed from tampering by a second or sealing screw 3l which is sealed in any suitable 'manner to a fixed part of the meter.

f The meteris provided with an indicating mechanism for registering the fluid measured and this is illustrated 'as consisting of a gear train 32 within a split casing 33 which is removably held by screws 34 in a recess 35V formed in the upper surface of plate 15. The indicator plate 36 for the registering mechanism is riveted in position, as at 37, and its periphery covers the screws 34, precluding the removal of thesplit case by unauthorized the spindle 38. In rotating the hand contra-,` y

clockwise to set the indicator to zero, the spring rotates freely about' spindle 38, but if an attempt is made to operate the hand to a position inadvance ofits point of rotation the spring 41 will wind on the spindle and prevent such operation.

Operation of the meter can be summarized as follows :Assuming that a source of fluid under pressure is connected to inlet 5 and that vfluid is' free to discharge'from outlet 6, Huid flows from inlet 5, thru orifice 7, channel or passageway 22, port 24, to that portion of the upper chamber 2 upon one-side of the upper piston 9. Because of the fiuid pressure thereby exerted upon one side of the upper piston, this piston is caused to gyrate in one direction. As the upper piston 9 gyrates from the position shown in Fig. 6, the lower piston 9 is moved to uncover port 30 and therefore fluid flow also occurs from inlet 5 thru orice 7, channel or passageway 25, port 30 into the lower chamber 2 at one side of the lowerpiston 9. Therefore'the lower piston 9 is urged by Huid pressure to gyrate in the same direction with which the upper piston is urged. When the upper piston 9 has gyrated substantially 180 from the position shown/in Fig. 4, port 24 is cut-offer closed. Howeverrthe upper piston continues to gyrate because of the fiuid pressurepon the lower piston; Upon fur-4 ther movement of the upper piston past the point at which ports 20 and 24 are closed, fluid is again introduced into the upper chamber 2 thru port 24 to effect another complete gyration of the upper piston. During each complete gyration of the upper piston, the" as'determined by the setting of screw 30.-

lIn addition to the advantages and features which have beenpointed out above, it should be noted that the usev of two connected or duplex pistons permits an absolute 'cut-011` of the inflow ports 24 and 30, and outlet ports .20 and 27 Suchjan absolute cut-o'eliminates the possibility of direct low of fluid thru the meter otherthan thru by-pass 28. The possibility of having a dead center position is obviated by the duplex piston arrangement.

chamber, a piston within the chamber and of Furthermore the cut-oil' effected with respect to ports 20, 24. 27 and 30 is a shearing cut-of which is an advantage in handling viscous liquids, such as tar or lubricating greases. It should also be noted that fluid presents in slot l() and fwithin the cavities'provided in pistons 9, present through leakage from chamber 2, will not interfere with proper movement of the pistons, due to the fact that such fluid is free to surge back and'forth thru ring 12. In this connection it will be observed that spaces 44 permit flow of uid between slot 10 and the cavities within the pistons.

I claim:

1. A meterfor measuring luids passing therethrough yunder pressure comprising a meter casing provided with a circular piston chamber, a piston within the chamber and of a diameter less than that of the chamber to permit a gyrating of the piston within said chamber, a ringy bearing 'mountedl for rotation centrally of said chamber, a connection between said ring and said piston, said connection being eccentric of the ring and axially of the piston, said piston Ibeing radially slotted, a bridge plate disposed vertically within the chamber and extending into Asaid slot, said plate at its outer end fulcrumed to swing on a vertical axis, indicator mechanism operated by the movement of said piston,

said casing provided with Huid inlet and out- 1 let ports communicating with said chamber, one at each side of said bridge, said piston affording a valve for controlling the opening and closing of said ports.

2. A meter for measuring fluids passing therethrough under pressure comprising a meter casing provided with a circular piston chamber, a piston within the chamber and of a diameter less than that of the chamber cruined to swing on a vertical axis, indicator mechanism operated by the movement of said piston, said casing provided with fluid inlet and outlet ports communicating with said chamber, one at each side of said bridge, said piston affording a valve for controlling the opening and closing of said ports.

3. A meter for measuring fluids passing therethrough under pressure comprising a meter casing provided with a circular piston a diameter less than that of the chamber to permit a gyratin of the piston within said chamber, a ring iearing mounted' for rotation centrally of said chamber, a connection between said ring and said piston, said connection being eccentric of the ring and axially of the piston, said piston being radially slotted, a bridge plate disposed vertically'A within the chamber and extending into said slot, said plate at its outer end fulcrumed to swing on a vertical axis, indicator mechanism operated by the movement of said piston, said casing provided with fluid inlet and outlet ports communicating with the interior of said chamber through its side wall, one ateach side of said bridge, said piston in its r movement alternately opening and closing said ports in succession.

4. A meter for'measu'ring fluids passingtherethrough under pressure comprising a meter casing provided with a circular `piston chamber, a piston within the chamber and of a diameter less than that of the chamber to permit a gyiatin said chamber, a rin gearing mounted for rotation centrally o? nection between said ring and said piston, said connection bein eccentric of the ring and axially of the piston, said piston being radially slotted, a bridge plate disposed ver, tically within the chamber and extending into said slot, said plate at its outer end fulcrumed to swing'on avertical axis, indicatormechanism operated by the movement of said piston, said casing provided with fluid inlet and-outletzports communicating of the piston within.l

said chamber, a con! with said chamber, one at each side of said pendently of the controlling of said ports,

and means for controlling said by-pass.

5. A meter for measuring Huid passing therethrough under pressure comprising a meter casing provided with a circular piston chamber, a piston within the chamber and of a diameter less than that of the chamber to permit a gyrating of the vpiston within the chamber, 'a bearing member journaled to rotate upon an axis concentric tothe chamber, a connection between .said bearing member and said piston, said connection being excentric to the axisv of the chamber land ax-v ially of the piston, said bearing member having sufficient resilience or give to enable the piston to pass an obstruction in said chamer, a bridge plate-disposed within the casing, said plate vextending between the periphery of the chamber and the periphery of the piston and being disposed vertically within the chamber, and indicating mechanism operated by movement of said piston, said casing being provided with fluid inlet and4 outlet ports communicating with said chamber, one at each side of said bridge, said v opening and closing of said ports.

6. A meter` for measuring fluid passing therethrough comprising a meter casing provided with .a circular piston chamber, a piston within the chamber and of a diameter less than that of the chamber'to permit a gyrating vofthe piston within the chamber, a split ring bearing journaled to rotate about an axis concentric to the chamber, ,a connection between said bearing member and said piston, Said connection being excentric to the vaxis of the chamber `and axiall of the piston, a bridge plate disposed within the casing, said plate extending between the periphery of the chamber and the o uter periphery of the piston,rindicating'mechanism operated b the movement of the piston, said casing. eing provided with fiuid inlet and outlet ports communicatin with said chamber, one at each side of said bridge, said piston affording a valve-for controlling the opening and closin of said ports.

In a meter for measuring iuids passing therethrough, a casing provided with a piston chamber, said casing alsofhaving fluid inlet and outlet orifices, a pistonwithin said chamberand of substantially less diameter than that of the chamber, said piston having a radial slot formed within the same, a bridge plate disposed vertically within the chamber and extending into said slot, said plate being fulcrumed to the casing to swing on a vertical axis, means for causing flow of fluid thruv the casing to effect a gyrating movement -of the piston within the same, and indicating means operated by movement of the piston.

8.' In a meter for measuring Huid passing therethrough, a casing provided with two axl ially alined circular pistonv chambers, said casinghaving inlet and outlet'orifices, a piston disposed in each ofv said chambers, eachl piston being of a diameter less than that of' its corresponding chamber to permit a gy-v rating of each piston within its respective chambera pin extending axially of both pistons and connecting said pistons together, a bearing member journaled to the casing and connected with said pin, said bearing member being adapted to rotate about an axis concentric With said chambers and having sufficient 4resilience or giveto permit substantial lateral movement of the pin toward the axis of the chambers whereby either .of said pistons can pass an obstruction in-"its res ective chamber, and means for causing fluid ow thru said casing to effect gyration of both said pistons.

9. A meter for measuring fluid passing therethrough under pressure comprising a meter casing provided with a circular piston chamber, a piston within the chamber and of a diameter less than that ofthe cham! lsaid chamber, a bearing mounted for axially of theypiston, said piston being radiall)T slotted, a bridge plate disposed vertically within the chamber. and extendinginto said slot, said plate at its outer end fulcrumed to swing on a vertical axis, said casing being provided with Huid inlet and outlet ports communicating with said chamber, one at each side of said bridge, said piston affording a valve for controlling the'opening and closing of said ports.

l0. In a'meter for measuring fluid passing therethrough, a casing provided with a pair of superposed circularpiston chambers, each of said chambers having parallel flat side walls, said casing having inlet and outlet orifices, circular pistons disposed within said chambers, each piston being of a diameter less than that of its corresponding chamber to permit a gyrating of each piston within its respective chamber, means connected to said pistons whereby they are caused to move in unison, and bridge plates disposed within said chambers, each platebeing arranged vertically and extending ,from one wall of the corresponding chamber to the periphery of the corresponding piston, said casing having two pairs of inlet and outlet ports communicating with the inflow and outflow orifices, each set vof said ports communicatin with the interior ton 'being of a diameter less than that of itsV corresponding chamber to permit a gyrating of each piston within Vits respective chamber, bridge vplates pivotally connected to the cas-l ing and disposed within said chambers, each piston being slotted to receive a correspond-` ing bridge plate, said casing being formed with two sets of Huid inlet and outlet ports in the walls of the chambers and communicating with the inflow and' outfiow orifices, one set of said ports being provided for each chamber, and means for connecting said pistons whereby they are caused to move in unison, said slots being in communication thru an opening in said casing.`

' In witness whereof, I have hereunto set my hand.

` MEAD CORNELL. 

